diff --git a/arch/powerpc/kernel/io-workarounds.c b/arch/powerpc/kernel/io-workarounds.c
index ffafaea3d261..12d329bcbb98 100644
--- a/arch/powerpc/kernel/io-workarounds.c
+++ b/arch/powerpc/kernel/io-workarounds.c
@@ -12,6 +12,7 @@
 #undef DEBUG
 
 #include <linux/kernel.h>
+#include <linux/sched.h>	/* for init_mm */
 
 #include <asm/io.h>
 #include <asm/machdep.h>